The intricate brain-heart connection: The relationship between heart rate variability and cognitive functioning

Area of Science:

• Neuroscience
• Psychology
• Cardiology

Background:

• Growing interest in the brain-heart connection, mediated by the autonomic nervous system and vagus nerve.
• Vagally mediated heart rate variability (vmHRV) as an index of top-down control in cognition and emotion regulation.
• Prior research suggests higher vmHRV correlates with enhanced cognitive performance.

Purpose of the Study:

• To investigate the relationship between cardiac vagal tone (vmHRV) and cognitive functions in healthy young adults.
• To determine if resting vmHRV predicts performance across various cognitive domains.

Main Methods:

• A sample of 143 healthy young adults participated in the study.
• Participants completed a comprehensive neuropsychological battery to assess cognitive functions.
• Resting vagally mediated heart rate variability (vmHRV) was measured as an indicator of cardiac vagal tone.

Main Results:

• A strong correlation was found between resting vmHRV and cognitive functions, particularly executive processes.
• Individuals with higher resting vagal tone demonstrated superior performance in cognitive control, inhibition, flexibility, and working memory.
• vmHRV also showed associations with memory, attention, and overall executive performance.

Conclusions:

• Higher cardiac vagal tone is associated with enhanced cognitive abilities, especially executive functions.
• The findings support the concept of body-brain interactions and the role of the autonomic system in cognition.
• This research offers new insights into the interplay between cognitive and autonomic systems.